/**
 * 数据库链接
 */
const mongoose = require('mongoose')
const config = require('./index')
const log4js = require('./../utils/log4j')
mongoose.connect(config.URL, {
    userNewUrlParser: true,
    useUnifiedTopology: true
})
const db = mongoose.connection

db.on('error', () => {
    log4js.error('***数据库连接失败***')
})
db.on('open', () => {
    log4js.info('***数据库连接成功***')
})